Printing machine



FIG. 1 is a front elevational view of a printing machine showing our new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a top plan view; and

FIG. 6 is a front and right side perspective view with the front tray lowered. 

The ornamental design for a printing machine, as shown and described. 